Rafael Nadal defeated Novak Djokovic 7-5, 6-2 at the ATP World Tour Finals on Wednesday, his Serbian opponent bothered by a problem with his contact lenses that forced him to leave the court.
There were visual issues as well in the earlier Group A match. Andy Roddick was angered by flashing lights behind the baseline during his racket-busting 7-5, 6-3 loss to Tomas Berdych that left him with an 0-2 record at this season-ending tournament.
Djokovic, who lost to the top-ranked Nadal in this year's U.S. Open final, called for a timeout out early in the eighth game. After Nadal held at love to make it 4-4, Djokovic left the court to tend to the problem, but it seemed to persist when he returned.